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Features: Extend concept to C language.

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Add properties and variables corresponding to CXX equivalents.

Add features for c_function_prototypes (C90), c_restrict (C99),
c_variadic_macros (C99) and c_static_assert (C11). This feature
set can be extended later.

Add a <PREFIX>_RESTRICT symbol define to WriteCompilerDetectionHeader
to conditionally represent the c_restrict feature.
This commit is contained in:
Stephen Kelly
2013-11-04 01:15:43 +01:00
parent 775458dede
commit e0890d03a4
57 changed files with 630 additions and 27 deletions
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24
Modules/WriteCompilerDetectionHeader.cmake
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@@ -43,7 +43,8 @@
# Possible compiler identifiers are documented with the
# :variable:`CMAKE_<LANG>_COMPILER_ID` variable.
# Available features in this version of CMake are listed in the
# :prop_gbl:`CMAKE_CXX_KNOWN_FEATURES` global property.
# :prop_gbl:`CMAKE_C_KNOWN_FEATURES` and
# :prop_gbl:`CMAKE_CXX_KNOWN_FEATURES` global properties.
#
# Feature Test Macros
# ===================
@@ -102,6 +103,7 @@
# ========================== =================================== =================
# Feature Define Symbol
# ========================== =================================== =================
# ``c_restrict`` ``<PREFIX>_RESTRICT`` ``restrict``
# ``cxx_constexpr`` ``<PREFIX>_CONSTEXPR`` ``constexpr``
# ``cxx_deleted_functions`` ``<PREFIX>_DELETED_FUNCTION`` ``= delete``
# ``cxx_extern_templates`` ``<PREFIX>_EXTERN_TEMPLATE`` ``extern``
@@ -221,6 +223,9 @@ function(write_compiler_detection_header
if (feature MATCHES "^cxx_")
list(APPEND _langs CXX)
list(APPEND CXX_features ${feature})
elseif (feature MATCHES "^c_")
list(APPEND _langs C)
list(APPEND C_features ${feature})
else()
message(FATAL_ERROR "Unsupported feature ${feature}.")
endif()
@@ -239,6 +244,8 @@ function(write_compiler_detection_header
if(_lang STREQUAL CXX)
set(file_content "${file_content}\n#ifdef __cplusplus\n")
else()
set(file_content "${file_content}\n#ifndef __cplusplus\n")
endif()
compiler_id_detection(ID_CONTENT ${_lang} PREFIX ${prefix_arg}_
@@ -279,6 +286,16 @@ function(write_compiler_detection_header
string(TOUPPER ${feature} feature_upper)
set(feature_PP "COMPILER_${feature_upper}")
set(def_name ${prefix_arg}_${feature_PP})
if (feature STREQUAL c_restrict)
set(def_value "${prefix_arg}_RESTRICT")
set(file_content "${file_content}
# if ${def_name}
# define ${def_value} restrict
# else
# define ${def_value}
# endif
\n")
endif()
if (feature STREQUAL cxx_constexpr)
set(def_value "${prefix_arg}_DECL_${feature_upper}")
set(file_content "${file_content}
@@ -382,9 +399,8 @@ function(write_compiler_detection_header
\n")
endif()
endforeach()
if(_lang STREQUAL CXX)
set(file_content "${file_content}#endif\n")
endif()
set(file_content "${file_content}#endif\n")
endforeach()